package com.zust.data.util.senly;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.security.MessageDigest;

/**
 * 小加解密类，主要是BASE64的加解密
 * @author chen
 *
 */
@SuppressWarnings("restriction")
public class Coder {  
    public static final String KEY_SHA = "SHA";  
    public static final String KEY_MD5 = "MD5";  
   
    /** 
     * BASE64解密 
     *  
     * @param key 
     * @return 
     * @throws Exception 
     */ 
    public static byte[] decryptBASE64(String key) throws Exception {  
        return (new BASE64Decoder()).decodeBuffer(key);  
    }  
   
    /** 
     * BASE64加密 
     *  
     * @param key 
     * @return 
     * @throws Exception 
     */ 
    public static String encryptBASE64(byte[] key) throws Exception {  
        return (new BASE64Encoder()).encodeBuffer(key);  
    }  
   
    /** 
     * MD5加密 
     *  
     * @param data 
     * @return 
     * @throws Exception 
     */ 
    public static byte[] encryptMD5(byte[] data) throws Exception {  
   
        MessageDigest md5 = MessageDigest.getInstance(KEY_MD5);  
        md5.update(data);  
   
        return md5.digest();  
   
    }  
   
    /** 
     * SHA加密 
     *  
     * @param data 
     * @return 
     * @throws Exception 
     */ 
    public static byte[] encryptSHA(byte[] data) throws Exception {  
   
        MessageDigest sha = MessageDigest.getInstance(KEY_SHA);  
        sha.update(data);  
   
        return sha.digest();  
   
    }  
}
